The loss function used for the FSA-HBF structure is also given by (REF ). However, \(\bar{\mathbf {A}}_{q}\)  is constrained to be of the form given by (REF ), where \(\mathbf {S}=\mathbf {S_{\sf {FSA}}}\) , and \(\mathbf {S_{\sf {FSA}}}\)  corresponds to the “Squared” connection defined in [1]}.
